Officials warn southeast Michigan residents to be careful outdoors Tuesday because of expected high ozone pollution levels.

Smoke from Canadian wildfires persisted across the Upper Midwest on Friday, prompting air quality alerts for millions.

A special weather statement and warning have been issued for southern Ontario on Wednesday. The heat warning continues with temperature highs around 32 C or 40 C with the humidex in the Greater ...

"It is recommended that, when possible, you avoid strenuous outdoor activities, especially those with heart disease and ...

The Mid-Ohio Regional Planning Commission has issued an air quality alert for July 23 for four central Ohio counties, ...

Windsor-Essex, Chatham-Kent and Sarnia-Lambton can all expect elevated air pollution levels again Tuesday. Environment and ...

Air quality, smoke and ozone alerts are in effect for much of the state heading into a hot, smoky weekend. A red flag warning ...

Firefighters on the Green Fire in the Shasta-Trinity forest and Butler Fire in the Orleans Complex brace for storms on Friday ...

Firefighters bolstered containment on the Green Fire in the Shasta-Trinity forest, while the Orleans Complex grew. What to ...

Much of Central Canada was placed under special air quality statements amid smoke from wildfires, as Environment Canada ...

Besides temperatures feeling in the high 90s, Chicago and surrounding areas are under an air quality alert until midnight, ...

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday, July 15. Here's what to know ...